SYMBOLCOMMON_NAMEaka. SYNONYMS
osx.pirrit (Back to overview)

Pirrit


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References
2020-07-29ESET Researchwelivesecurity
@techreport{welivesecurity:20200729:threat:496355c, author = {welivesecurity}, title = {{THREAT REPORT Q2 2020}}, date = {2020-07-29}, institution = {ESET Research}, url = {https://www.welivesecurity.com/wp-content/uploads/2020/07/ESET_Threat_Report_Q22020.pdf}, language = {English}, urldate = {2020-07-30} } THREAT REPORT Q2 2020
DEFENSOR ID HiddenAd Bundlore Pirrit Agent.BTZ Cerber ClipBanker CROSSWALK Cryptowall CTB Locker DanaBot Dharma Formbook Gandcrab Grandoreiro Houdini ISFB LockBit Locky Mailto Maze Microcin Nemty NjRAT Phobos Ransomware PlugX Pony REvil Socelars STOP Ransomware Tinba TrickBot WannaCryptor
2017-12-13ZDNetZack Whittaker
@online{whittaker:20171213:maker:6ee7ab6, author = {Zack Whittaker}, title = {{Maker of sneaky Mac adware sends security researcher cease-and-desist letters}}, date = {2017-12-13}, organization = {ZDNet}, url = {http://www.zdnet.com/article/maker-of-sneaky-mac-adware-sends-security-researcher-cease-and-desist-letter/}, language = {English}, urldate = {2020-01-08} } Maker of sneaky Mac adware sends security researcher cease-and-desist letters
Pirrit
2017CybereasonAmit Serper
@techreport{serper:2017:osx:f818c68, author = {Amit Serper}, title = {{OSX Pirrit: Part III}}, date = {2017}, institution = {Cybereason}, url = {https://www.cybereason.com/hubfs/Content%20PDFs/OSX.Pirrit%20Part%20III%20The%20DaVinci%20Code.pdf}, language = {English}, urldate = {2019-12-04} } OSX Pirrit: Part III
Pirrit
2016-04-06CybereasonAmit Serper
@techreport{serper:20160406:osx:99415a1, author = {Amit Serper}, title = {{OSX Pirrit: What adware that 'just' displays ads means for Mac OS X security}}, date = {2016-04-06}, institution = {Cybereason}, url = {http://go.cybereason.com/rs/996-YZT-709/images/Cybereason-Lab-Analysis-OSX-Pirrit-4-6-16.pdf}, language = {English}, urldate = {2019-11-23} } OSX Pirrit: What adware that 'just' displays ads means for Mac OS X security
Pirrit
Yara Rules
[TLP:WHITE] osx_pirrit_auto (20201014 | autogenerated rule brought to you by yara-signator)
rule osx_pirrit_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2020-10-14"
        version = "1"
        description = "autogenerated rule brought to you by yara-signator"
        tool = "yara-signator v0.5.0"
        tool_config = "callsandjumps;datarefs;binvalue"
        malpedia_reference = "https://malpedia.caad.fkie.fraunhofer.de/details/osx.pirrit"
        malpedia_rule_date = "20201014"
        malpedia_hash = "a7e3bd57eaf12bf3ea29a863c041091ba3af9ac9"
        malpedia_version = "20201014"
        malpedia_license = "CC BY-SA 4.0"
        malpedia_sharing = "TLP:WHITE"

    /* DISCLAIMER
     * The strings used in this rule have been automatically selected from the
     * disassembly of memory dumps and unpacked files, using YARA-Signator.
     * The code and documentation is published here:
     * https://github.com/fxb-cocacoding/yara-signator
     * As Malpedia is used as data source, please note that for a given
     * number of families, only single samples are documented.
     * This likely impacts the degree of generalization these rules will offer.
     * Take the described generation method also into consideration when you
     * apply the rules in your use cases and assign them confidence levels.
     */


    strings:
        $sequence_0 = { 5b 5d ff25???????? 8b4338 }
            // n = 4, score = 100
            //   5b                   | pop                 ebx
            //   5d                   | pop                 ebp
            //   ff25????????         |                     
            //   8b4338               | mov                 eax, dword ptr [ebx + 0x38]

        $sequence_1 = { 48 8d0d894b0000 48 8b35???????? }
            // n = 4, score = 100
            //   48                   | dec                 eax
            //   8d0d894b0000         | lea                 ecx, [0x4b89]
            //   48                   | dec                 eax
            //   8b35????????         |                     

        $sequence_2 = { c705????????00000000 48 8d05d6270000 48 8905???????? 48 }
            // n = 6, score = 100
            //   c705????????00000000     |     
            //   48                   | dec                 eax
            //   8d05d6270000         | lea                 eax, [0x27d6]
            //   48                   | dec                 eax
            //   8905????????         |                     
            //   48                   | dec                 eax

        $sequence_3 = { 89c6 48 8b3d???????? 48 8b35???????? 4c 8b3d???????? }
            // n = 7, score = 100
            //   89c6                 | mov                 esi, eax
            //   48                   | dec                 eax
            //   8b3d????????         |                     
            //   48                   | dec                 eax
            //   8b35????????         |                     
            //   4c                   | dec                 esp
            //   8b3d????????         |                     

        $sequence_4 = { 48 8945d8 b000 e8???????? }
            // n = 4, score = 100
            //   48                   | dec                 eax
            //   8945d8               | mov                 dword ptr [ebp - 0x28], eax
            //   b000                 | mov                 al, 0
            //   e8????????           |                     

        $sequence_5 = { 48 8b7f08 48 8b15???????? }
            // n = 4, score = 100
            //   48                   | dec                 eax
            //   8b7f08               | mov                 edi, dword ptr [edi + 8]
            //   48                   | dec                 eax
            //   8b15????????         |                     

        $sequence_6 = { 48 8d05bd130000 48 8d0d020e0000 }
            // n = 4, score = 100
            //   48                   | dec                 eax
            //   8d05bd130000         | lea                 eax, [0x13bd]
            //   48                   | dec                 eax
            //   8d0d020e0000         | lea                 ecx, [0xe02]

        $sequence_7 = { 48 8b7dd8 45 84f6 7414 48 8d352f2e0000 }
            // n = 7, score = 100
            //   48                   | dec                 eax
            //   8b7dd8               | mov                 edi, dword ptr [ebp - 0x28]
            //   45                   | inc                 ebp
            //   84f6                 | test                dh, dh
            //   7414                 | je                  0x16
            //   48                   | dec                 eax
            //   8d352f2e0000         | lea                 esi, [0x2e2f]

        $sequence_8 = { 8d059f2c0000 48 8d0db52c0000 48 }
            // n = 4, score = 100
            //   8d059f2c0000         | lea                 eax, [0x2c9f]
            //   48                   | dec                 eax
            //   8d0db52c0000         | lea                 ecx, [0x2cb5]
            //   48                   | dec                 eax

        $sequence_9 = { 0f85e5010000 48 8d3da70b0000 e8???????? 48 }
            // n = 5, score = 100
            //   0f85e5010000         | jne                 0x1eb
            //   48                   | dec                 eax
            //   8d3da70b0000         | lea                 edi, [0xba7]
            //   e8????????           |                     
            //   48                   | dec                 eax

        $sequence_10 = { 56 53 50 49 89fe be01000000 e8???????? }
            // n = 7, score = 100
            //   56                   | push                esi
            //   53                   | push                ebx
            //   50                   | push                eax
            //   49                   | dec                 ecx
            //   89fe                 | mov                 esi, edi
            //   be01000000           | mov                 esi, 1
            //   e8????????           |                     

        $sequence_11 = { 8d35972e0000 ba02000000 48 89df e8???????? 85c0 }
            // n = 6, score = 100
            //   8d35972e0000         | lea                 esi, [0x2e97]
            //   ba02000000           | mov                 edx, 2
            //   48                   | dec                 eax
            //   89df                 | mov                 edi, ebx
            //   e8????????           |                     
            //   85c0                 | test                eax, eax

        $sequence_12 = { 89cf 88853ffeffff e8???????? 8a853ffeffff a801 0f8505000000 e9???????? }
            // n = 7, score = 100
            //   89cf                 | mov                 edi, ecx
            //   88853ffeffff         | mov                 byte ptr [ebp - 0x1c1], al
            //   e8????????           |                     
            //   8a853ffeffff         | mov                 al, byte ptr [ebp - 0x1c1]
            //   a801                 | test                al, 1
            //   0f8505000000         | jne                 0xb
            //   e9????????           |                     

        $sequence_13 = { 48 c705????????00000000 48 8d0546290000 48 8905???????? 48 }
            // n = 7, score = 100
            //   48                   | dec                 eax
            //   c705????????00000000     |     
            //   48                   | dec                 eax
            //   8d0546290000         | lea                 eax, [0x2946]
            //   48                   | dec                 eax
            //   8905????????         |                     
            //   48                   | dec                 eax

        $sequence_14 = { 48 0f45c8 48 890c24 48 8d35492c0000 }
            // n = 6, score = 100
            //   48                   | dec                 eax
            //   0f45c8               | cmovne              ecx, eax
            //   48                   | dec                 eax
            //   890c24               | mov                 dword ptr [esp], ecx
            //   48                   | dec                 eax
            //   8d35492c0000         | lea                 esi, [0x2c49]

        $sequence_15 = { 747f eb1a 48 8d05662e0000 48 8945d0 }
            // n = 6, score = 100
            //   747f                 | je                  0x81
            //   eb1a                 | jmp                 0x1c
            //   48                   | dec                 eax
            //   8d05662e0000         | lea                 eax, [0x2e66]
            //   48                   | dec                 eax
            //   8945d0               | mov                 dword ptr [ebp - 0x30], eax

    condition:
        7 of them and filesize < 169600
}
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